Residential apartment buildings stand in this aerial photograph taken above Gimpo, South Korea, on Friday, July 10, 2020. South Korea’s government is preparing new regulations to curb excessive house price gains that have fueled public discontent over inequality and property speculation. Photographer: SeongJoon Cho/Bloomberg
Residential apartment buildings stand in this aerial photograph taken above Gimpo, South Korea, on Friday, July 10, 2020. South Korea’s government is preparing new regulations to curb excessive house price gains that have fueled public discontent over inequality and property speculation. Photographer: SeongJoon Cho/Bloomberg

South Korean bond bears have reaped a windfall as yields surged since September. Politics may prove to be an unlikely ally as they bet on more gains.

Monetary policy is shaping up to be a key issue in the run-up to next year's presidential election, with candidates expected to focus on ways to rein in soaring household debt, rising debt loads and asset-price bubbles. The case for higher interest rates got a boost Tuesday after Governor Lee Ju-yeol indicated the central bank may tighten in November.

The nation's three-year yield has jumped 40 basis points since end-August as its U.S. counterpart climbed and the Bank of Korea laid the ground for more rate increases. The hawkish tilt mirrors the stance of developed-market central banks and could set the stage for other Asian policy makers to follow suit.

"From the perspective of foreigners, the noise around South Korea's housing market is not a positive," said Moon Hongcheol, a fixed-income and FX strategist at DB Financial Investment Co. "That factor has contributed to the rise in bond yields lately and could cause them to edge up higher."

Three-year government bond yields jumped nine basis points to 1.80 per cent on Tuesday after central bank chief Lee flagged worsening financial imbalances, growing price pressures and a solid recovery momentum. He added that two policy board members disagreed with the decision to stand pat on Tuesday as they saw a need for a tightening.

Swap markets are pricing in more than an even chance of a rate hike next month.

Higher interest rates would complement the government's efforts to rein in household debt, which jumped 10.3 per cent from a year earlier in the April-June period, the fastest pace since 2017. The authorities are keen to curb asset-price gains as unaffordable housing is a key factor that has drained support for President Moon Jae-in's administration.

The opposition has also weighed in on the issue, with a contender in the presidential race warning that debt levels are unsustainable and the housing market could be headed for a collapse. The candidate who won the presidential primary for the ruling Democratic Party has also vowed to launch real estate reforms to rein in debt levels.